Comparison of material properties and biofilm formation in interim single crowns obtained by 3D printing and conventional methods
Comparison of material properties and biofilm formation in interim single crowns obtained by 3D printing and conventional methods
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DOI：
10.1016/j.prosdent.2020.06.026
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发表时间：
2022-01-10
影响因子：
4.6
通讯作者：
dos Santos, Mateus Bertolini Fernandes
中科院分区：
文献类型：
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作者：
Simoneti, Debora Meincke;Pereira-Cenci, Tatiana;dos Santos, Mateus Bertolini Fernandes
陈述问题。三维打印的临时牙列是牙科领域最新的技术进步之一。然而，缺乏证据证明它们的表现。这项体外研究的目的是比较通过3D打印与不同技术，激光立体光刻（SLA），技术和选择性激光烧结（SLS）制成的临时涂层的性能与通过丙烯酸树脂和双丙烯酸树脂的常规技术获得的材料和方法。测试了四个不同的组（丙烯酸树脂、双丙烯酸树脂、SLS、SLA）的弯曲强度、维氏显微硬度、疲劳测试、压缩强度、抛光前后的表面粗糙度和生物膜形成。按照每种材料的制造技术，以矩形块、圆盘和单冠的形式制作标本。单因素方差分析用于测试生物膜形成、维氏显微硬度和3点弯曲挠曲测试的结果，而配对t检验用于评估材料之间的表面粗糙度的差异（对于所有测试，a= 0.05）。最高的维氏显微硬度值是丙烯酸树脂临时冠，而两种3D打印材料的弹性模量较低。在疲劳测试期间，仅SLA树脂断裂。对于表面粗糙度，研究材料之间存在统计学显著差异（P.05）。SLS树脂的维氏显微硬度，更高的最大弯曲强度，并在负载断裂试验，疲劳试验和生物膜形成相比，丙烯酸树脂和双丙烯酸树脂的峰值应力有良好的结果，而SLA树脂表现出良好的结果，仅为生物膜的形成和表面粗糙度。
Statement of problem. Three-dimensionally printed interim restorations are among the recent technological advancements in dentistry. However, evidence of their performance is lacking.Purpose. The purpose of this in vitro study was to compare the properties of interim restorations made by 3D printing with different technologies, laser stereolithography (SLA), technology and selective laser sintering (SLS) with those obtained by conventional techniques from acrylic resin and bis-acryl resin.Material and methods. Four different groups (acrylic resin, bis-acryl resin, SLS, SLA) were tested for flexural strength, Vickers microhardness, fatigue test, compressive strength, surface roughness before and after polishing, and biofilm formation. Specimens were made in the form of rectangular blocks, disks, and single crowns by following the manufacturing technique of each material. One-way ANOVA was used to test biofilm formation, Vickers microhardness, and the results of the 3-point bend flexural test, while the paired t test was used to assess differences in surface roughness between the materials (a=.05 for all tests).Results. The highest Vickers microhardness value was for acrylic resin interim crowns, while the elastic moduli were lower for both the 3D printed materials. Only the SLA resin fractured during the fatigue test. For surface roughness, a statistically significant difference was found among the studied materials (P.05).Conclusions. SLS resin had favorable results for the Vickers microhardness, higher maximum flexural strength, and peak stress in load-to-fracture tests, the fatigue test, and biofilm formation compared with acrylic resin and bis-acryl resin, while SLA resin showed favorable results only for biofilm formation and surface roughness.